Three resistors are in parallel. They each have the same resistance. If the equi

Question

Three resistors are in parallel. They each have the same resistance. If the equivalent resistance is 40, then what is the individual resistance of each resistor? There are two parallel wires which both have a 20 A current flowing through each of them. If the wires are a distance of 0.5 m apart, then what is the magnitudeof the magintude force per unit length between them? An object is placed 50 cm from a converging (convex) lens which has focal length of 25cm. (i) Draw a neat ray diagram. (ii) How far from the lens is the image located? (iii) Is it the image: real or virtual? upright or inverted? Larger, smaller or same size as object? A pair of narrow slits separated by 0.0002 m is Illuminated by light. An observation placed 1 m from the slits. If the first bright fringe Ls 0.003 m from the center of the observation screen, then what is the wavelength of the light? All three resistors in the circuit below have the same resistance R. If a 2 A current is flowing around this circuit, then find R (Left figure)? A diver goes into the ocean with a flashlight. When she shines the flashlight up towards the surface, it is observed that none of the light escapes the water if the light hits the surface at an angle greater than 60 degrees with respect to the normal line. What is the index of refraction of the water? Find the equivalent resistance between points a and b (Right figure). The resistance are all given in ohms. When a resistor in the form of a rectangular metal block is connected in series with a 10 V battery, a 4 A current flows through it. If the metal block has a length of 0.1 m and a cross-sectional area of 0.01m^2, then what is its resistivity?

Explanation / Answer

(6)
Equivalent resistance of the circuit, Req = R+R+R = 3*R
I = 2 A
V = 5.0 V

We know,
V = I*Req
5.0 = 2 * 3 * R
R = 5/6
R = 0.83

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